10. February 2010 11:30
Based on the blog of Bryan Krieger, http://blogs.msdn.com/bkrieger/archive/2010/02/03/tfs-2010-beta2-to-rc-upgrade-guide.aspx, I upgraded a single server TFS 2010 Beta 2 environment within a few hours to RC.
It was a wonderful experience to see how smooth an upgrade can be done. Microsoft, thanks for the hard work you did to make our life so much easier.